I think with the mmWave PTMP equipment, perhaps both because of FCC rules as sometimes how the frequencies can be used is dictated, and the direction of incorporating the Facebook/Meta routing protocols, manufactures and product developers were limited towards using some of the mmWave frequencies with what would be a wireless CSMA/CA system as I understand it using larger channels that wouldn’t normally be able to operate at higher modulation rates but still offering much higher throughput. However, it also seems likely that a hybrid Part 101 type system where an access point for lack of a better word could have multiple transmitters and multiple receivers even with some if not all CPE/SM units having essentially both a Part 101 type PTP system using smaller channel sizes and with prediction models of without or with very little interference, AND – also potentially have a CSMA/CA system incorporated too. While I would not profess to be an expert about what radios are cheap enough to meet budget goals and what the effects of unit sizes would be it does seem reasonably feasible to me at this point that a hybrid Part 101 type solution also incorporating a CSMA/CA system is potentially able to be created but would frankly require better handling of interference issues.
For example, I suspect it may be feasible soon to have an AP have say something like say 12 as a scenario dedicated transmit and 12 dedicated receive radios working with up to 12 SM units typically with a smaller channel size and next to practically zero latency while also having the normal CSMA/CA system operating with not just those 12 SM units but also any other SM units attached and depending on traffic pattern goals even potentially change which of the SM units currently operate using the Part 101 type PTP system and not just the CSMA/CA system. This type of system might also work in the 6Ghz frequency range if not in the U.S. perhaps oversees where people who intentionally illegally interfere with others might be actually dealt with.
Next, I, like many larger WISPs, often have a SM that can connect to not just one AP on my sites but multiple AP units. It would be nice, and I think feasible, to have newer SM units be able to simultaneously connect to not just a single AP but multiple AP units and have either a WISPs own network combine these into what appears one fast Internet connection to the customer or having a provider-controlled system such as a “combiner” that is essentially a router/switch combining traffic streams through different AP units if not just one from any given SM. That, frankly, to me, though perhaps not the best solution in an environment where interference is handled well, obviously excluding the United States at least IMO, could allow an SM to connect to multiple AP units using smaller channel sizes when interference is a problem and then combine them and also could assist with single point of failure concerns where an AP could be not reachable even if because of interference of other concerns but another AP was already part of multiple traffic streams that SM was already communicating with and being combined in the back end.